Alan Morton Dershowitz is an American lawyer and academic. He is a scholar of United States constitutional law and criminal law, and a noted civil libertarian. Most of his career has been noted at Harvard Law School where, in 1967, at the age of 28, he became the youngest full professor of law in its history. He held the Felix Frankfurter professorship there, from 1993, until his retirement, in December 2013, and subsequently became a regular CNN and Fox News contributor and political and legal analyst.